402512125 has 8 divisors (see below), whose sum is σ = 502335288. Its totient is φ = 322009600.

The previous prime is 402512119. The next prime is 402512177. The reversal of 402512125 is 521215204.

It can be written as a sum of positive squares in 4 ways, for example, as 62552281 + 339959844 = 7909^2 + 18438^2 .

It is not a de Polignac number, because 402512125 - 2¹⁹ = 401987837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402512096 and 402512105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1609924 + ... + 1610173.

It is an arithmetic number, because the mean of its divisors is an integer number (62791911).

Almost surely, 2^402512125 is an apocalyptic number.

It is an amenable number.

402512125 is a deficient number, since it is larger than the sum of its proper divisors (99823163).

402512125 is an equidigital number, since it uses as much as digits as its factorization.

402512125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220112 (or 3220102 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 402512125 is about 20062.7048276148. The cubic root of 402512125 is about 738.3455398462.

Adding to 402512125 its reverse (521215204), we get a palindrome (923727329).

The spelling of 402512125 in words is "four hundred two million, five hundred twelve thousand, one hundred twenty-five".